Effect of anhedral on a reverse delta wing

Abstract

The effect of anhedral on the vorticity flowfield and aerodynamic loadings of a slender reverse delta wing was studied experimentally. The addition of anhedral always led to a reduced lift and lift-to-drag ratio in comparison with their clean-wing counterparts. The drag was increased with increasing anhedral compared to the clean wing at the same lift condition. The reverse delta wing vortex retained its regularity to a higher angle of attack as the anhedral was increased. The persistent outboard location of the reverse delta wing vortex suggests that the lift force was mainly produced by the pressure exerted on the bottom surface of the wing. The anhedral also led to an increased vorticity level and tangential velocity.